Piston-ring.



1.0. HENDERSON.

PlsmN RING@ A?PL!CAT10N FlLED OCT` 1,7 1914.n

1 ,214,303. Patent-ed Jan. 30, 1917.

` ring yin the piston fil' ITED STATES PATENr orF'LIoE.

JOHN cHAnLns HENnEn'soN, or sim rnmczsco, cALI'ronNrp PISTON-RING.

To all 'wp/wm it may concern.' l

Be it known that l', JonN C. HENDERSON, a citizen of the vUnited States, residing at the city nnd'county of San Francisco and Statexof California, have invented newl and iisefulz'linprovements in Piston-Rings, of 'whichl the following is a specification.

This invention re ates to that class of iston rings which is known as leak-proc or jointless. l

It is'one of the objects of the present invention to provde'a simple, durable, cheaply manufactured piston ring of the character described-which is not onlywithoiit a transversey opening `extending entirely through the ring'und expansible circumferentially, hut which isa-lso expansilile in the direc-` tion ofi'tlie longitudinal axis of 'the piston, thus maintaining u tight jointv in the piston groove which eliminates knocking of the roove and also prevents leakage around t e edges of the' ring through. the .groove- Further objects will hereinafter appear.

The invention consists of the parts and ltheconstruction and coi'nliination of parts as hereinafter more fully described and claimed', havin reference to the accompanying drawings, in which- Figure 1 is a perspective view of the ring. Fig. 2 is ,a perspective view of the outer ring section. Fig. 3 is a perspective view of the `inner ring section. Fig. 4 is 'a section of a piston showing the applica tion of the rings.

More particularly described, the piston ring comprises a pair ofteleseoping rings 2 and 3, both split throughout their depth, as indicated respectively at 4 and 5. The inner or mejor ringQ embraces the piston, and the inside Wall of said ring is: straight', as indicated at 6. vwhile the outer wall js tapered cone-like` as at 7, andterniinates in iinannular base fiange 8 which forms a. seat for the4 outer or minor ring 3. The exterior wall of this ring is straight` as at 9, to lit the inner Wall of the cylinder, while the in ner surface is tapered, as at 10, to fit the tapered exterior surface 7 of ring 2.

When the ringsiire assembled .the splits will stand diametrieally oppositefto each other, as shown in Fig. l. Ring 3 will thus overlap split 4; in ring 2 while flange 8 will 'close split 5 in ring 3. The transverse opening which would otherwise be formed through each ring is thusclosed, it being .patented Jan. 3o, 1911...; sppiicanonnierioetober17,1914. iiriaiitesemosf r "L clear that without overlapping 'colistruction a transversely extending opening in the ring would be formed-between the ends-of the ring which,-- when the ring is in' use,.would result in leakage. .Thus 1t will lie seen that with the construction set forth of one ring with relation to `the other auto-` inatically takes up all wear at these points and not onliv eliminates knock or play of the rings within the grooves liut always insures i the jointsI at the respective" ends of theise' a tight joint which will positively eliminate anyleakage around the rings.

The ring sections areforined of spring4 metal` such .as cast iron orthe l1keS0-as,to f

poi-init of the sainelieing .expanded in or der to slide the rings over the-piston head i into engagement with the annular grooves"= usuali)y provided in 'the piston head for the reception of the rings. `After being arfV ranged in position in the grooves, the re silicnev of the sections serves to press the latter outwardly nto engagement Vwith the walls of the cylinder in order fto establish a tightV joint as is readily understood by' those skilled in the art.

The sections fit one within the other, as shown, and the contact 'of the outer ring with the piston wall prevents same from turning with relation to' the piston. Flangb 4Si of the inner ring-similarlycontacts with the cylinder wall and the cone-like outer face of the ringr will at the vsaine time engage with the inner tapered face of the outer ring. r)She rings are-.thus Il'i'ictionall'y locked together and preventeiil'lroni turning with rclai-ionto nach other and n 'oLintei-lodking pin will l e,needed,"as the area of the con#`- tact-ing surfaces of the rings just described,

Atogether with that presented a'gainst the piston wall, isv much greater `than the area presented h y the edgerof each, ring against the upper and lower favalls of the piston grooves. y

-The materials and finish of the Several parts of the piston ring are such as the ei!` perence and muy dictate.

judgment of the manufacturer 4 sndeonstruction here 'iu 1. A piston ring com rising inner andv innerring4 forming an outerjr'mg, an. exterior cone'like surface onv of. less' width ,than the n I wish itunderstood that vsirious changes 1n form, proportionsandminor' details of construction muy be resortcdto within the Scope o-'the appended claims and that I do the'specifc de-` notwish to limit myself to Shown.

ving thus described my invention, what I claim and desire to secure by LettersTatmving a tendency a flange on one edge :in abutment for outer 'sp 1t spring rings to expand outwardly, of Said inner ring forming the wearing, on `said inner ring extending from the flan-ge to the opposite edge of the ring, and an interior conelike surface on the outer ring extending the entire width thereof-and C011- tacting with :the corresponding cone-like surface on the inner ring, and'a'dapted to slidelaterally thereon.

2. A Piston *ringy comprising inner and outer sp 1 t rings having e spring-like tendency to expand outwardly, a flange on said abutment Vfor thc the Inner ring," and an interior cone-like surface on the' outer ring, said outer ring being inner ring and terlmnating even with one 'edge thereof, I the construction being such thut'said cone-like surfaces constitute the entire bearing' sur- .face between said rings so that the outer ring -is free tovslide laterally on the inner ring.

uny exterior coneilike surface edge o said ring, andra cone-like sur lnamens A iston ring comprising inner and outer sp it rings having a,; spring like tendency to expand outwardly, a ilange on the exterior cope like surface 'on inner ring, an the inner ring, and an interior cone like surface on the outer ring, -said outer ring be-A in'gof less width thanjthe inner ring-'and terminating even with one edge thereof, the

construction being such"thst said 'cone like surfaces constitute the entire bearing surface between' said rings so that the outer ringis free to slide laterally on the inner ring, and the area'of said outer ring con.-

tacting with thecylinder wall being 'lessv 'than the area of the conical bearing surfaces. Y

4. A split ring comprising inner and outer split spring rings having 'artendency to expand outwardly, a flange on one ed e of one ring forming an abutment for the ot tendin from said 'Bunge to the o the other ring extending'the entire width thereof and contacting with the corresponding cone-like surface on the hanged ring, and adapted to slide laterally thereon.

In testimony whereof I- have-hereunto set my hand -in the witnesses.

JOHN 4CHARLES Witx'ilessesiJ l HENDERSON.

er ring,- a cone-like-'surface on the flnngedringexposite ace on presence of two 'subscribing 

